private bool ensurePosition(ExecutedBlock beforeBlock, ExecutedBlock afterBlock, ExecutionView view, List <Transformation> transformations)
{
if (view.IsBefore(beforeBlock, afterBlock))
{
//no transformation is required
return(true);
}
//we need to get after block behind before block
var shiftTransform = new ShiftBehindTransformation(afterBlock, beforeBlock);
transformations.Add(shiftTransform);
view.Apply(shiftTransform);
return(!view.IsAborted);
}